#pragma once
#include "PolyglotStackTraceDecoder.h"
#include "DebugAdapterRouter.h"
#include <string>
#include <vector>

namespace whetstone {

struct StepIntoResult {
    bool        switched         = false;
    std::string previousLanguage;
    std::string newLanguage;
    int         targetFrameId    = -1;
};

class CrossLanguageStepIntoHandler {
public:
    // Step-into at a boundary: switch active adapter to the next frame's language.
    StepIntoResult stepInto(const StackFrame& frame,
                            DebugAdapterRouter& router,
                            const std::vector<StackFrame>& frames,
                            int frameIndex) const {
        int next = frameIndex + 1;
        if (!frame.isBoundary ||
            next >= static_cast<int>(frames.size()) ||
            frames[next].language == frame.language)
            return {false, "", "", -1};

        std::string prev    = router.getActiveLanguage();
        std::string newLang = frames[next].language;
        router.setActiveLanguage(newLang);
        return {true, prev, newLang, frames[next].id};
    }
};

} // namespace whetstone